Evaporator



April '4, 1933. c. E. L. LIPMAN ,9

EVAPDRATOR Filed Feb. 27, 1931 5 heets-sheet 1 607%5227. Lg; Wm,

mm W hawk r M April 4, 1933. c. E. L. LIPMAN EVAPCRATOR Filed Feb. 27, 1931 3 Sheets-Sheet 2 mezwr/ @WZKL WM 9 MM April 4, 1933. c. EVL. LIPMAN EVAPORATOR Filed Feb. 27, 1931 5 heets-Sheet 5 k -mafia, M, Mam MM Patented Apr. 4, 1933 um'rso STATES PATENT OFFICE CARL I. Ia. mm, 01' CHICAGO, ILLINOIS, ASSIGNOB 'IO IIIPIA N PATENTS CORPORA- 110R, CHICAGO, ILLINOIS, GORYORATION O! DELAWARE IVAPOBL'I'OB Application fled February 87, 1981. Serial Io. 518,745.

This invention relates to evaporators for use in refrigerating s stems and to an evaporator that is articu arly well suited for use in the so-calle flooded systems.

It is the purpose of this invention to provide an evaporator that is eificient, economical to manufacture in particularly quantity production and readily assembled.

In accordance with this invention the evaporator is constructed of two unitary sections so constructed that they may be interleaved with each other and interconnected to provide oneor more refri eratin chambers substantially surrounded iy a re rigerating medium. In the preferred construction embodying the principles of this invention the evaporator comprises a pair of unitary sections, each of which is com osed of a pair of spaced headers connected by spaced tubes, the tubes being bent into irregular shape in such a manner that when the tubes of the two sections are interlaced or interleaved they will form one or more refrigerating chambers. In another substantially equivalentconstruction the tubes of each section may be returned to a single header, thus eliminating one header.

A better understandin may be had of this invention from the f0 lowing description given in connection with the dra ings in which:

Fig. 1 is a side elevation of an evaporator constructed in accordance with this invention Fig. 2 is a front elevation of the evaporator illustrated in Fig. 1,

Fig. 3 is a perspective view of the two unitary sections em loyed in making the evaporator shown in igs. 1 and 2,

Fig. 4 is a front elevation of a modified form of this invention,

Fig. 5 is a front elevation of a still further modified form of this invention,

Fig. 6 is a perspective of'alining or sleeve,

Fig. 7 is a perspective view of two still furposition prior to being placed to ther modified sections illustrated in spaced ether, and

Fig. 8 is an end'elevation similar to Fi 2 of an eva orator constructedof the modi ed sections s own in Fig. 7.

Referring more particularly to the form of this invention illustrated in Figs. 1 to 3 inclusive, and with particular reference to 3, it will be seen that the evaporator comprises two unitary sections, each of which is composed of an upper suction header and a s aced lower parallel header 2, the two headers eing connected by means of spaced parallel tubes 3 terminating in the headers. The tubes 3 intermediate their terminating ends, in the illustrated embodiment, are bent angularly at substantiall right angles at three points 4, 5, and 6 (see ig. 3) to provide four strai ht portions lying in different planes, the tu es of each portion all lyin in the same plane. The units or sections w en turned through 180 and interleaved will define two rectangular refrigerating chambers 7 and 8 (Fig. 2), chamber 7 bein directly above chamber 8. Into the cham ers thus formed by the interleaving of the two units or seet1ons are inserted two rectangular cylindrical sleeves 9 which serve to retain the two sections in position, i. e., the two sleeves interlock the sections so that the cannot be moved either together or "apart. is a further means of securing the sections together in interleaved position, the tubes may be soldered, or otherwise secured at their intersecting points to each other or to the sleeves, or both. If desired, a shelf 10 may be supported across the upper chamber 7 to dividethe same into two smaller chambers. For supporting the evaporator, brackets 18 may be secured to the suction headers.

The two suction headers 1 are joined by cross conduits 11, which enter the suction headers above a bafile 12, and communicate with a common suction line 13. A charging tube 14 may also be connected to the suction line for char g the entire system after which it ma i e sealed off. The two lower liquid hea ers are also interconnected through cross pi es 16 and communlcate w1th a common liquid inlet 17.

In the modification illustrated in Fig. 4 the tubes of each section are bent intermediate their ends into three portions only,

or more refrigerating chambers.

ed by whereby the tubes when interleaved define only one rectangular refrigerating chamber.

In the modification illustrated in Fig. 5 the tubes of each section are bent into seven strai ht sections, whereby the units when inter eaved will form three rectangular refrigerating chambers, each of which is substantially surrounded by refrigerant tubes.

In the form of this invention illustrated in Figs. 7 and 8, which is substantially equivalent to the form shown in Figs. 1 and 2, it will be seen that the evaporator is composed of two sections each of which involves one header only. Each section comprises an upper header 1 from which bent tubes 3 depend. The tubes instead of being joined to a lower header are returned parallel to themselves and terminate in the same header. That is, both ends of each tube terminate in the upper header. In the illustrated form the tubes are bent to provide the same number of sections as shown in the form illus trated in Figs. 1, 2, and '3, although it is obvious that the tubes may be bent as shown in Fi land 5, for example. As in the prior firms of this invention, the headers are hooked together by conduits 11 to provide a common suction line 14. The headers are also connected below the internal baflie by a conduit 16 leading to a common liquid connection 17. This form of the invention embodies all of the advantages previously de scribed except that of having the liquid inlet enter the bottom of the evaporator and the advantages resultant therefrom.

From the foregoing description it will be apparent that an evaporator is provided composed of two unitary sections, each of which may be exactly similar in construction, thereby reducing manufacturing cost, and which may be interleaved to provide one Each of the chambers will be substantially surroundspaced refrigerant tubes which will provide for very eflicient transfer of heat.

It is obvious that many forms or shapes of refrigerating chambers may be provided as well as a number of individual chambers, andthat other changes in the details of construction may be accomplished without departing from the spirit and scope of the invention as defined in the claims appended hereto.

I claim:

' 1. In an evaporator, a pair of unitary sections, each section comprising a header and tending therefrom and terminating at both ends in said header, the tubes of one section being interleaved with the tubes of the other section to form an enclosure constituting a refrigerating chamber and in such a manner that the tubes of each section bound at least two sides of said chamber.

2. In an evaporator, a pair of unitary sections, each section comprising a header and a plurality of spaced refrigerant tubes extending therefrom and terminating at both ends in said header, the tubes of one section being interleaved with the tubes of the other section to form an enclosure constituting a refrigerating chamber and in such a manner that the tubes of each section bound at least two sides of said chamber, and common connections to the headers for the admission and withdrawal of refrigerant.

3. In an evaporator, a pair of unitary sections, each section comprising a header and a plurality of spaced refrigerant tubes extending therefrom and terminating at both ends in said header, the tubes of one section being interleaved with the tubes of the other section to form an enclosure and in such a manner that the tubes of each section bound at least two. sides of said enclosure, a sleeve inserted in said enclosure constituting a refrigerating chamber.

4:. 11 an evaporator, a pair of unitary sectlons, each sectioncomprising a header and a plurality of spaced tubes extending therefrom and terminating at both ends in said header, the tubes of each section being bent angularly so as to lie in two intersecting planes, the tubes of one section being interleaved with the tubes of the other section to form an enclosure and in such a manner that the tubes'of eachsection bound at least two sides of said enclosure.

5. In an evaporator, a pair of unitary sections, each section comprising a header and a plurality of spaced tubes extending therefrom and terminating at each end in said header, the tubes of each section being bent angularly so as to lie in two intersecting planes, the tubes of one section being interleaved with the tubes of the other section to form a rectangular enclosure and in such a manner that the tubes of each section bound at least two sides of said enclosure.

6. In an evaporator, a pair of unitary sections each section comprising a pair of spaced headers connected by a plurality of spaced refrigerant tubes terminating in said headers,

the tubes of one section being interleaved with v the tubes of the other section to form an enclosure surrounded on two sides at least by the tubes of each section, a sleeve inserted in said enclosure and constituting a refrigerating chamber, said sleeve serving tolock said sections against relative movement.

7. In an evaporator, a pair of'unitary sec tions, each section comprising a pair of spaced headers connected by a plurality of spaced refrigerant tubes terminating in said headers,

the tubes of one section being interleaved with v the tubes of the other section to form a plurality of enclosures each surrounded on two sides at least by the tubes of each section,

CARL E. L. LIPMAN. 

